07-25-1994 Council Packet - Laserfiche WebLink

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vafd A Sinft>0 PE n A Go*OOfi. PE eft» Pfiet*>ene. PE uid W Po«ef PE ftd O Louou PE en C Puwe* ^»A y A Boufdon. PE rt A Hamon. PE hje* T Raumaon PE K Field. PE xnat 8 Ancenon. AiA naid C Bufgaidc. PE ynas A SyfliQ PE dene J Stenoexg. PE laei M^tvnei, PE :naei P Rau. PE Agnes M Ring. AlC P Tnomas W Perenon PE Micnaei C lynen PE James R Maiand. PE jeny 0 Ppftzscn PE Scoff J Argane^. PE nennetn P Andew^ PE .Viafk R RqRs. PE Mant A Se»a PE Gary W Monen. PE Pam J Gannon. AIA Daniel J Edgenon PE A Rick ScrvTwx. PE Ph*p J Cas^Mek. PE. Mark O PE Miles 8 Jensen PE L Pruiip Gravel PE Kj*en L Wemeo. PE Gary O knoote. PE F Tootj Fouer PE Ketry R raoo PE Douglas J Berxx. PE Snawvn D Gustafson. PE Okviff P£ Pam G Heuer PE jonn P GokJer. PE Cnaries A Erckson Leo M PaMetsky Hanan M Oiion James F EngeRsaffl Mils to the drainage way on Kelly Avenue ents for improving the storm sewer outlet d within the report. il and staff at your convenience to review OCIATES, INC. Feasibility Report of Kelly Avenue Area Storm Drainage Improvements City of Orono July 1994 Introduction The City of Orono ordered the preparation of this report to evaluate the feasibility of improving the drainage for the ponds on Kelly Avenue North of Carman Road. The drainage in this area has been a problem for 20 years or more. The purpose of this report is to define several options for the improvements and provide estimated project costs to determine project feasibility. The project will require permits from the Watershed and DNR. Project Description The existing drainage way appears to have been pieced together over time as development occurred. The storm sewer lines are of various sizes and don’t seen to have a consistent direction of flow. The Hooding of Kelly Avenue occurs annually and the street is impassible during certain periods of time. This results in an inconvenience to the neighborhood that can be eliminated The vegetation in the ponding areas between Kelly Avenue and Carman Road make it impossible for the water to recede in a reasonable amount of time. The proposal here would be to reduce the amount of time water stands over Kelly Avenue. The project would not eliminate standing water because the elevation of Kelly Avenue in this area is only 1.5 feet above the ordinary high water level for Lake Minnetonka. We have identified four options for constructing an outfall line as shown on Figure 1 . Option A - Provides for construction of storm sewer following Kelly Avenue from the Kelly pond to the Carman Cove Pond. This option results in a 20 foot deep excavation on Kelly Avenue to provide gravity flow. The advantage of this option is that the work can be completed on the street right-of-way. Option B - Provides for construction of storm sewer that follows the natural drainage way. This route is across private property and will require some tree removal. The depth of excavation is minimized by following the perimeter of the wetland area. Option C - Provides for replacement of the existing culverts and drainage tile in the area. This drainage route again follows the natural drainage route. This option would require excavation in the wetland area to create more open water and assure positive drainage. Option D - Provides for construction of storm water pipe between the ponds. This option utilizes the ponds for water quality improvement as does option "C". This option utilizes the best features of the other options. " i 612-636-4600 •*. ___.•